Cost
My first deal was a complete car with drivetrain and cost $2500, the transmission was broke but I fixed it for $48. The car had a bad paint job. I stripped it and sold just the body for $500. And I still have the rearend, wheels and tires.
My second deal was just an engine, transmission and wiring harness for $1200.
My third deal was a smashed car with good complete drivetrain for $2300.